The line shape of K x-rays of heavy elements during the collision with energetic ions

The K x-ray structure of Ta and U has been studied with a high resolution crystal spectrometer using the high energy ion beam of the Juelich cyclotron. For energy calibration and to analyse the profile of single lines the x-rays were also excited by proton bombardment. The experimental results are compared with theoretical calculations. The satellite energies were computed with a multiconfiguration Dirac-Fock program and the intensities were calculated in the semiclassical separated-atom approximation. The overall agreement is quite good although small but significant deviations remain. (author)